[benologist]

Don't those companies have established business models they are simply repeating at a profitable level?

I think all you have shown is HN is a source of extremely ineffective marketing for that idea. Your "what's next" seems premature too because HN can't get you "10x more traffic" and even a 10x better conversion will still be barely 1 registration per thousand visitors.

Tomorrow your old front page posts will send you almost no traffic, or ever again, so where is the business model let alone the validation? Still in the testing part, imho. $900 up but no closer to sustainable.

[mike2477]

I'm confused how $900 in my first week isn't closer to sustainable? What would be?

[benologist]

So far you've extrapolated everything from getting to the front page of HN once, but the more you do that the more their software learns who's helping you with upvotes even as you wear out your welcome in the community. That's not sustainable.

I think you could convince 13 people amongst a group of 15,863 to buy just about anything and that doesn't really prove demand either.

What would be sustainable is finding something that still delivers registrations/customers/money next week when your HN posts are unpopular and it's all tapped out. Somewhere that can actually deliver on the 10x more traffic you aspire to have next and thus worth optimizing your sales funnels for.